| Texto completo | |
| Autor(es): |
Septimio, Rudimylla S.
[1]
;
Arenas, Maria A.
[2]
;
Conde, Ana
[2]
;
Garcia, Amauri
[1]
;
Cheung, Noe
[1]
;
de Damborenea, Juan
[2]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Campinas, UNICAMP, Dept Mfg & Mat Engn, BR-13083860 Campinas, SP - Brazil
[2] CSIC, CENIM, Natl Ctr Met Res, Madrid - Spain
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CORROSION ENGINEERING SCIENCE AND TECHNOLOGY; v. 54, n. 4, p. 362-368, MAY 19 2019. |
| Citações Web of Science: | 0 |
| Resumo | |
Bi-Zn solder alloys with different Zn contents (1.5, 2.7 and 5wt-%) were prepared by casting and the correlation between the microstructure and corrosion behaviour by mean of direct current electrochemical tests was studied. The surface analysis of the hypoeutectic Bi-Zn alloy samples revealed the presence of needle-like ZnO and very small agglomerated spherical particles. By contrast, eutectic alloy presented the formation of a uniform and compact film of ZnO, which is related to the better distribution of Zinc in the Bi-rich matrix. Despite the increase in Zn content compared to the hypoeutectic alloy, the corrosion rate showed similar values regardless of its content in the alloy. The Bi-5wt-% Zn alloy presented the highest limiting current density, and consequently, the highest degree of corrosion of the studied alloys. The pro-eutectic phase consisting of large and thick Zn fibres is preferentially dissolved, promoting a selective attack that penetrates inside the sample. (AU) | |
| Processo FAPESP: | 17/16058-9 - Microestruturas de Solidificação e Resistência ao Desgaste de Ligas Monotéticas Zn-Al-Bi |
| Beneficiário: | Noe Cheung |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |
| Processo FAPESP: | 17/15158-0 - Caracterização microestrutural e de propriedades na avaliação de ligas para contato térmico interfacial |
| Beneficiário: | Amauri Garcia |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |